A YouTuber out of the UK feared for his life after a prank went horribly wrong.

Jay Swingler, 22, of the TGFbro YouTube channel placed a plastic bag over his head, held a tube to his mouth to breath and then stuck his head into a microwave filled with Polyfilla, a plaster, on Wednesday. A friend then used a hair dryer to harden the mixture. About 10 minutes of blow drying stiffened the "cement" nearly solid, according to a video posted by the group.

"I've never appreciated life so much," he said in a video posted to the channel Thursday.

“As funny as this sounds, this young man could quite easily have suffocated or have been seriously injured,” said Watch Commander Shaun Dakin, officer in charge of the West Midlands Fire Service crew who responded, in a statement.